In the video Ms Wilkins heckles an innocent Asian passenger standing next to the man filming an earlier incident, calling her victim a "gook", mocking her accent, pulling at her eyes back in imitation and jeering her for coming to "our country".

"It's not nice what I did to that lady," Ms Wilkins told ninemsn.

"It wasn't nice to say that to her because it's not nice when people say that to me ... call me white trash and fatso. I know how it hurts and I shouldn't be saying it to other people."

Ms Wilkins, who had that day taken buses and trains from the NSW Central Coast down to Sydney to look for work, says she has been carrying the burden of being scammed out of $100,000 by a Dutch man she met on dating website RSVP.

Since returning from Holland after the failed romance, Ms Wilkins said she had been lucky enough that her family on the Central Coast had allowed her to live with them while she searched desperately for work as a secretary.

On the day she was filmed on the train, Ms Wilkins says she had asked a group of children to stand up for her to sit down.

Ms Wilkins says she argued with the children's mother, who told her they did not have to leave their seats.

"I thought it was just a disgrace," Ms Wilkins said.

"What sort of an example is that setting for your children? It's just appalling."

Her racist tirade began after a man started filming her as she phoned police to complain about the children who would not vacate their seats.

Ms Wilkins first started taunting the man filming – calling him a "sad, poor, pathetic man" – before locking eyes with the woman beside him, who he had no association with.

What followed was Ms Wilkins' abusive heckles, calling the woman a "gook" and telling the man filming he couldn't "even get a regular girlfriend".

"Oh, look at this bogan here, he's got a gook. Oh look at it, isn't it sad that he can't get a regular girlfriend, he's got to get an Asian? And she probably thinks he's rich," Ms Wilkins said.

Despite saying she was having a "really, really rotten day" when she lashed out on the train, Ms Wilkins admits now she acted inappropriately.

"I had a rotten day, I've been chasing work for quite some time now. It's awful what I said to that woman, I do agree," Ms Wilkins said.

"There's no excuse to rant at people like that.

"It's awful and I wouldn't wish it on my worst enemy, regardless of any race."

A NSW Police spokeswoman told ninemsn officers were trying to track down people involved in the incident.

"We take incidents such as this very seriously and we are attempting to identify and locate those involved," she said.

"Anyone who witnessed the incident or can assist with inquiries is urged to come forward."

Transport for NSW has said it will not "tolerate threats to customers".

"We'll work with (NSW Police) to ensure customers feel safe on every journey," the department said.